Opaque mat with ribbed pattern



FIG. 1 is a top plan view of the opaque mat with ribbed pattern embodiment of the present invention;

FIG. 2 is a profile view of the opaque mat with ribbed pattern;

FIG. 3 is a magnified view of the opaque mat with ribbed pattern from FIG. 2; and,

FIG. 4 is a magnified view of the opaque mat with ribbed pattern from FIG. 1. 

CLAIM The ornamental design for an opaque mat with ribbed pattern, as shown and described. 